US6243360B1 - Network server having dynamic load balancing of messages in both inbound and outbound directions - Google Patents
Network server having dynamic load balancing of messages in both inbound and outbound directions Download PDFInfo
- Publication number
- US6243360B1 US6243360B1 US09/157,740 US15774098A US6243360B1 US 6243360 B1 US6243360 B1 US 6243360B1 US 15774098 A US15774098 A US 15774098A US 6243360 B1 US6243360 B1 US 6243360B1
- Authority
- US
- United States
- Prior art keywords
- switch
- server
- network
- port
- ports
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/742—Route cache; Operation thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1023—Server selection for load balancing based on a hash applied to IP addresses or costs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/62—Establishing a time schedule for servicing the requests
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/10015—Access to distributed or replicated servers, e.g. using brokers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
Definitions
- This invention relates to communication systems. More particularly, the invention relates to a server-workstation network with dynamic load balancing of messages in both the server inbound and outbound directions.
- Routing, bridging and switching are existing techniques to optimize performance between workstations and servers.
- load balancing software has been introduced to further improve performance between work stations and servers.
- Load balancing software allows you to place multiple Network Interface Cards (NICs) into a server and attach the cards to one logical network.
- NICs Network Interface Cards
- multiple balanced networks can be connected to one server.
- a system administrator would assign a unique address to each NIC.
- the NICs can be bound to one logical address, providing load sharing (balancing) across the server bus.
- load balancing software uses dynamic balancing for outgoing traffic (data from the server to the workstation) and static balancing for incoming traffic (from the workstation to the server).
- Dynamic balancing works by sending packets to each NIC in turn. For example, with four NICs in the server, the first packet is routed to NIC number 1; the second packet to NIC number 2; the third packet is routed to NIC number 3; the fourth packet to NIC number four; such that each NIC transmits every fourth packet.
- NIC number 1 is assigned to workstations 1 , 5 , 9 and 13 ;
- NIC number 2 is assigned to workstations 2 , 6 , 10 and 14 ;
- NIC number 3 is assigned to workstations 3 , 7 , 11 and 15 and so forth.
- NIC number 1 will be overloaded while NICs 2-4 will be idle.
- the latency for each workstation will increase and the throughput on the network will decrease by the unbalanced loading of the NICs.
- the present invention is directed to improving both the latency and the throughput on a network having a plurality of workstations coupled through a network switch to a server having multiple entry ports.
- U.S. Pat. No. 5,031,089 issued Dec. 30, 1988 describes a dynamic resource allocation scheme for distributed heterogeneous computer systems.
- a decentralized resource sharing scheme is distributed over several compute engines in the network.
- the disclosure requires a computation of a “workload value” and the transmission thereof to all nodes on the network.
- U.S. Pat. No. 5,025,491 issued Oct. 26, 1989 describes dynamic address binding in communication networks.
- '491 patent describes the relocation of servers, for example in the event of a “crash”, and the rerouting of messages to a new server.
- U.S. Pat. No. 5,193,151 issued Aug. 30, 1989 describes a delay based congestion avoidance in computer networks.
- the '151 patent discloses a method to reduce traffic load based on a metric such as round-trip delay for a message and its associated acknowledgement.
- U.S. Pat. No. 5,249,290 issued Feb. 22, 1991 describes a client/server computer network where the server uses a busy indicator to assign a new client service request to the least busy processor.
- the '290 patent uses a workload metric to assign “client” server requests to “servers”.
- U.S. Pat. No. 5,293,488 describes a message routing apparatus that uses a Network Interface Card for each network and a shared routing manager.
- the '488 patent relates to “filtering” messages or frames in a routing environment to decide whether or not to forward the message or frame to a particular network.
- U.S. Pat. No. 5,241,677 describes a multi-processor system and a method of load balancing.
- the '677 patent balances the computational load on processors to maximize multi-processing efficiency.
- the publication discloses assigning a “client” to the least loaded “server” as measured by a non-specific metric.
- None of the prior art describe a communication network including a network server with multiple Network Interface Cards coupled to a plurality of workstations through a network switch, the in-bound and out-bound messages to/from the server being dynamically balanced to improve latency, throughput and recovery from fault conditions on the network.
- An object of the invention is to provide a communication network with improved latency and throughput.
- Another object is to provide a communication network including multi-port server which always returns to a workstation the address of the first port installed in the server.
- Another object is to provide a multi-port server having dynamically balanced network interface cards for in-bound and out-bound messages from/to a plurality of workstations.
- Another object is to provide a multi-port server including a plurality of Network Interface Cards which are made “route equivalent” for inbound messages.
- Another object is to provide a network switch which dynamically routes in bound messages to a first available port in a multiple port server.
- Another object is to provide a network switch which matches a designated address for a data packet to a particular switch port.
- Another object is to provide a method of dynamically balancing inbound and outbound messages between a plurality of workstations and a multi-port server.
- a communications network including a server having multiple entry ports, each port served by a channel coupled to a plurality of workstations through a network switch.
- Each workstation includes a Network Interface Card (NIC) which sends/receives data packets to/from the switch after obtaining a Media Access Control (MAC) address of a NIC in the server with which it wishes to communicate.
- NIC Network Interface Card
- Each workstation NIC transmitting a packet to the server receives in return an address of the first entry port into the server or other network device that has more than one network interface card installed.
- the MAC address is stored by the workstation for future data packet transmissions.
- the workstation is connected to an associated input port of the network switch.
- the switch includes a destination port connected to each server port through a channel.
- the switch includes means to prepend a routing header to a data frame or packet transmitted to the switch by a workstation, the header identifying a particular destination port according to the destination of the data frame.
- the switch associates a destination port number with a server NIC address using, for example, a content addressable memory and a processor with a look-up table.
- the switch includes means to move the packet from the input port to the particular output or destination port through a medium, such as a bus and/or cross-bar switch “fabric” using the header address.
- the switch hardware determines that the destination port of a packet matches a particular switch destination port, and does not have a unique output routing; that is, a packet may be directed to the server through one or more channels.
- the switch Before transmitting a packet to the server, the switch strips the routing header from the data packet. The switch determines whether the particular switch destination port is currently busy, that is, processing a packet. If free, the first switch destination output port matching the packet header accepts the packet and provides a connection to the first server port. If the first switch destination port is busy, the second switch destination port matching the packet header accepts the packet and provides a connection to the associated server Network Interface Card. The second switch destination port only responds if the first switch destination port is busy as indicated, for example, by a “busy bit”. If the second switch destination port is also busy, the third switch destination port matching the packet header accepts the packet and provides a connection to the associated server NIC. This process continues until a switch destination output port is available to transmit the packet to the server.
- the availability of any server NIC to a workstation provides inbound dynamic load balancing and significantly better performance than a static balanced server, which is the case for present day servers.
- a communication network which has full-duplex traffic load balancing in a workstation—server environment.
- the network provides improved latency, throughput and superior recovery from fault conditions.
- FIG. 1 is a block diagram of a communications network incorporating the principles of the present invention.
- FIG. 2 is a format for a data packet or frame transmitted by a workstation to a multi-port server in the communications network of FIG. 1 .
- FIG. 3 is a detailed circuit diagram of a network switch included in the communications network of FIG. 1 .
- FIG. 4 is a representation of circuitry included in FIG. 3 for associating a switch port header with an address for a Network Interface Card in the multi-port server of FIG. 1 .
- FIG. 5A is a flow diagram for establishing in a multi-port server a MAC address for a workstation in the communications network of FIG. 1 .
- FIG. 5B is a flow diagram describing the data flow for a packet sent from a workstation to the multi-port server in the communications network of FIGS. 1 and 3 .
- a network switch 10 for a local area network 11 is coupled to a plurality of workstations 12 ′- 12 n for transmitting/receiving data packets or frames to be transmitted/received to/from a multi-port server 14 .
- Each workstation includes a Network Interface Card 16 ′ . . . 16 n for transmitting and receiving data packets to and from the server 14 .
- Each workstation is associated with a switch input port 18 ′ . . . 18 n .
- the switch 10 includes a plurality of destination output ports 20 ′ . . . 20 n , each output port associated with server Network Interface Card 22 ′ . . . 22 n through a channel 24 ′ . . .
- the switch 10 is adapted, as will be described hereinafter, to associate a destination port 20 ′ with the server address whereby whenever the switch transmits a data frame or packet from a workstation to a network destination address associated with the server, the switch will route the frame to a particular output or destination port of the switch that is connected to a Network Interface Card in the server.
- an IBM Token-ring Network Frame Format 28 includes a routing header field 30 which is prepended to the data frame 28 by the switch 10 , as will be described hereinafter.
- the routing header 30 is assigned a value associated with a switch destination port 20 ′ connected to a server Network Interface Card.
- the data frame 28 includes a start delimiter 32 ; access control field 34 and frame control field 36 .
- An end of packet indicator 50 is also appended to the frame 28 by the switch to further identify the routing header 30 . Both the routing header 30 and end of packet indicator 50 are stripped from the frame by the switch before transmission of the data frame to the output port 20 ′, as will be further described hereinafter.
- the switch transmits the data frame or packet to the server 14 through a destination port 20 ′ serving the MAC address for the frame.
- An address is returned by the server to the workstation.
- the address returned to the workstation is always the address of the first Network Interface Card installed in the server and is not assigned in a round-robin order as in the case of static load balancing for servers.
- each workstation Network Interface Card 16 ′ . . . 16 n (See FIG. 1) is connected to an associated switch input port 18 ′ — . . . 18 n , all input ports being connected to a server address locator (not shown) which associates a switch destination port number with a MAC address in a data frame transmitted by the workstation to the switch, as will be described in conjunction with FIG. 4 .
- Each input port is also connected to an output or destination port 20 ′ . . . 20 n through a cross-connect switch 52 .
- Each destination port 20 ′ is connected to a server network interface card 22 ′ though a channel 24 ′ (See FIG. 1) and to an input port 18 ′ through a control signal bus 54 .
- Each output or destination port is assigned a value which is selected by the switch 52 according to the header code shown in the table 56 and embodied in the data frame.
- a destination address locator 60 connected to the switch 52 and the control signal bus 52 , includes a microprocessor or application specific integrated circuit (ASIC) 62 coupled to a content addressable memory (CAM) 64 and a random access memory (RAM) 66 .
- the microprocessor 62 stores a destination address field 38 for a data frame 28 (See FIG. 2) in the content addressable memory 64 .
- the address stored in CAM 64 is used as an entry into a table look-up contained in the RAM 66 .
- the table look-up provides a code which indicates the address of the network interface card with which the transmitting workstation wishes to communicate.
- the code is embodied in the header 30 (See FIG. 2) is prepended to the frame by the processor 62 before transmitting the frame to the cross-connect switch 52 .
- the destination port number is provided as an input to the switch 52 which directs the processor to supply the packet to the designated output port.
- FIGS. 5A and 5B the process for dynamically balancing inbound and outbound data packets to and from a server will be described, as follows
- the network switch 10 is activated for processing messages between the workstations and the server.
- the switch activation process is entered in a step 501 , in which the switch is initialized from a “master” processor after power on or manual reset.
- the processor sets the communication channel speeds and defines any channel groups.
- step 503 the switch transmits on the network an address resolution protocol which maps all MAC addresses connected to each communication channel.
- a work station queries the network for a MAC address of a server with which it wishes to communicate by sending a data frame to a “Name Server” at a known address fixed by a network administrator or by convention.
- step 507 the queried server responds with the MAC address of the first network interface card installed in the server.
- step 509 the work station updates its address table with the MAC address provided by the queried server, and the switch activation process ends.
- the network data flow process is entered in at step 502 in which a workstation sends a data frame to the switch, the frame including a destination address for the server with which it wishes to communicate.
- the switch includes a Media Access Controller chip (not shown) which receives the destination address followed by the remainder of the data frame.
- a header is generated for the data frame from the destination address via the CAM/RAM lookup or other switch mapping method.
- step 508 the header is appended to the data frame together with an end of packet indicator in the locator 60 , and transmitted to the cross-connect switch 54 .
- step 510 the switch 54 tests the header to determine that the data frame matches the designated switch output for the destination address included in the data frame.
- step 512 the switch 54 tests that a destination port does not have a unique output routing, e.g. is part of a group and whether the destination port is currently busy. If the specified output or destination port is free, the packet is sent to the specified output port or destination port.
- step 514 If the specified output port is busy, the switch 54 checks to determine if other output ports are grouped with the specified output port.
- step 516 before the data frame is sent to the specified output port, the header and end of packet indicator are stripped from the frame.
- step 518 if another port is grouped with the busy port, steps 512 and 514 are repeated with the grouped port as the destination of the data frame.
- step 520 if there are no additional ports grouped with the busy port, the data frame is stalled until the specified port or port in the same group becomes available.
- step 522 the packet is transmitted to the first NIC channel of the server, which if busy transfers the packet to the second, third, etc. NIC available to send the packet to the destination address, after which the process ends.
- the packet load on the server is dynamically balanced, that is the packet load is distributed among the server NICs according to their workload which improves network latency and throughput.
Abstract
A communications network including a server having multiple entry ports and a plurality of workstations dynamically balances inbound and outbound to/from the server thereby reducing network latency and increasing network throughput. Workstations send data packets including network destination addresses to a network switch. A header is prepended to the data packet, the header identifying a switch output or destination port for transmitting the data packet to the network destination address. The network switch transfers the data packet from the switch input port to the switch destination output port whereby whenever the switch receives a data packet with the server address, the data packet is routed to any available output port of the switch that is connected to a Network Interface Card in the server. The switch includes circuitry for removing the routing header prior to the data packet exiting the switch. The server includes circuitry for returning to the workstation the address of the first entry port into the server or other network device that has more than one Network Interface Card installed therein.
Description
This application is a division of application Ser. No. 08/715,506, filed Sep. 18, 1996 and issued Jan. 26, 1999 as U.S. Pat. No. 5,864,535, hereby incorporated by reference.
1. Field of the Invention
This invention relates to communication systems. More particularly, the invention relates to a server-workstation network with dynamic load balancing of messages in both the server inbound and outbound directions.
2. Related Patent Application
This patent application is related to copending U.S. patent application Ser. No. 08/297,469, filed Aug. 29, 1994, now abandoned which is a U.S. counterpart application of UK Patent Application GB 2281793, published Mar. 15, 1995 and filed Nov. 9, 1993 by G. D. Wallis et al and assigned to the same assignee as that of the present invention.
3. Description of the Prior Art
Routing, bridging and switching are existing techniques to optimize performance between workstations and servers. Recently, load balancing software has been introduced to further improve performance between work stations and servers. Load balancing software allows you to place multiple Network Interface Cards (NICs) into a server and attach the cards to one logical network. In addition, multiple balanced networks can be connected to one server. Normally, under load balancing software or other operating systems, a system administrator would assign a unique address to each NIC. With load balancing software, the NICs can be bound to one logical address, providing load sharing (balancing) across the server bus.
In operation, load balancing software uses dynamic balancing for outgoing traffic (data from the server to the workstation) and static balancing for incoming traffic (from the workstation to the server).
Dynamic balancing works by sending packets to each NIC in turn. For example, with four NICs in the server, the first packet is routed to NIC number 1; the second packet to NIC number 2; the third packet is routed to NIC number 3; the fourth packet to NIC number four; such that each NIC transmits every fourth packet.
Static balancing works differently. When a workstation wishes to connect to a server, it finds the Media Access Control (MAC) layer destination address of the server by sending a request, for example, an Address Resolution Protocol (ARP) on to the network. The address returned by the server in response to the ARP request is used by that workstation until further notice. The software assigns response addresses in round-robin fashion. NIC number 1 is assigned to workstations 1, 5, 9 and 13; NIC number 2 is assigned to workstations 2, 6, 10 and 14; NIC number 3 is assigned to workstations 3, 7, 11 and 15 and so forth. If, for example, workstations 1, 5 and 9 all transmit essentially simultaneously (with static balancing) the server NICs will become unbalanced. That is, NIC number 1 will be overloaded while NICs 2-4 will be idle. As a result, the latency for each workstation will increase and the throughput on the network will decrease by the unbalanced loading of the NICs.
The present invention is directed to improving both the latency and the throughput on a network having a plurality of workstations coupled through a network switch to a server having multiple entry ports.
The prior art addressing load balancing on related networks is as follows:
U.S. Pat. No. 5,031,089 issued Dec. 30, 1988, describes a dynamic resource allocation scheme for distributed heterogeneous computer systems. A decentralized resource sharing scheme is distributed over several compute engines in the network. The disclosure requires a computation of a “workload value” and the transmission thereof to all nodes on the network.
U.S. Pat. No. 5,025,491 issued Oct. 26, 1989, describes dynamic address binding in communication networks. '491 patent describes the relocation of servers, for example in the event of a “crash”, and the rerouting of messages to a new server.
U.S. Pat. No. 5,271,003 issued Mar. 9, 1990, describes an internal routing method for load balancing. The '003 patent relates to rerouting messages in the event of a failed “message handling processor” in “circuit switched” networks.
U.S. Pat. No. 5,193,151 issued Aug. 30, 1989, describes a delay based congestion avoidance in computer networks. The '151 patent discloses a method to reduce traffic load based on a metric such as round-trip delay for a message and its associated acknowledgement.
U.S. Pat. No. 5,249,290 issued Feb. 22, 1991, describes a client/server computer network where the server uses a busy indicator to assign a new client service request to the least busy processor. The '290 patent uses a workload metric to assign “client” server requests to “servers”.
U.S. Pat. No. 5,293,488 describes a message routing apparatus that uses a Network Interface Card for each network and a shared routing manager. The '488 patent relates to “filtering” messages or frames in a routing environment to decide whether or not to forward the message or frame to a particular network.
U.S. Pat. No. 5,241,677 describes a multi-processor system and a method of load balancing. The '677 patent balances the computational load on processors to maximize multi-processing efficiency.
IBM Technical Disclosure Bulletin, Volume 37, Number 07, published July 1994, describes a remote log-in program to balance processing load. The publication discloses assigning a “client” to the least loaded “server” as measured by a non-specific metric.
None of the prior art describe a communication network including a network server with multiple Network Interface Cards coupled to a plurality of workstations through a network switch, the in-bound and out-bound messages to/from the server being dynamically balanced to improve latency, throughput and recovery from fault conditions on the network.
An object of the invention is to provide a communication network with improved latency and throughput.
Another object is to provide a communication network including multi-port server which always returns to a workstation the address of the first port installed in the server.
Another object is to provide a multi-port server having dynamically balanced network interface cards for in-bound and out-bound messages from/to a plurality of workstations.
Another object is to provide a multi-port server including a plurality of Network Interface Cards which are made “route equivalent” for inbound messages.
Another object is to provide a network switch which dynamically routes in bound messages to a first available port in a multiple port server.
Another object is to provide a network switch which matches a designated address for a data packet to a particular switch port.
Another object is to provide a method of dynamically balancing inbound and outbound messages between a plurality of workstations and a multi-port server.
These and other objects, features and advantages are achieved in a communications network including a server having multiple entry ports, each port served by a channel coupled to a plurality of workstations through a network switch. Each workstation includes a Network Interface Card (NIC) which sends/receives data packets to/from the switch after obtaining a Media Access Control (MAC) address of a NIC in the server with which it wishes to communicate. Each workstation NIC transmitting a packet to the server receives in return an address of the first entry port into the server or other network device that has more than one network interface card installed. The MAC address is stored by the workstation for future data packet transmissions. The workstation is connected to an associated input port of the network switch. The switch includes a destination port connected to each server port through a channel. The switch includes means to prepend a routing header to a data frame or packet transmitted to the switch by a workstation, the header identifying a particular destination port according to the destination of the data frame. The switch associates a destination port number with a server NIC address using, for example, a content addressable memory and a processor with a look-up table. The switch includes means to move the packet from the input port to the particular output or destination port through a medium, such as a bus and/or cross-bar switch “fabric” using the header address. The switch hardware determines that the destination port of a packet matches a particular switch destination port, and does not have a unique output routing; that is, a packet may be directed to the server through one or more channels. Before transmitting a packet to the server, the switch strips the routing header from the data packet. The switch determines whether the particular switch destination port is currently busy, that is, processing a packet. If free, the first switch destination output port matching the packet header accepts the packet and provides a connection to the first server port. If the first switch destination port is busy, the second switch destination port matching the packet header accepts the packet and provides a connection to the associated server Network Interface Card. The second switch destination port only responds if the first switch destination port is busy as indicated, for example, by a “busy bit”. If the second switch destination port is also busy, the third switch destination port matching the packet header accepts the packet and provides a connection to the associated server NIC. This process continues until a switch destination output port is available to transmit the packet to the server. The availability of any server NIC to a workstation provides inbound dynamic load balancing and significantly better performance than a static balanced server, which is the case for present day servers.
Summarizing, a communication network has been described which has full-duplex traffic load balancing in a workstation—server environment. The network provides improved latency, throughput and superior recovery from fault conditions.
FIG. 1 is a block diagram of a communications network incorporating the principles of the present invention.
FIG. 2 is a format for a data packet or frame transmitted by a workstation to a multi-port server in the communications network of FIG. 1.
FIG. 3 is a detailed circuit diagram of a network switch included in the communications network of FIG. 1.
FIG. 4 is a representation of circuitry included in FIG. 3 for associating a switch port header with an address for a Network Interface Card in the multi-port server of FIG. 1.
FIG. 5A is a flow diagram for establishing in a multi-port server a MAC address for a workstation in the communications network of FIG. 1.
FIG. 5B is a flow diagram describing the data flow for a packet sent from a workstation to the multi-port server in the communications network of FIGS. 1 and 3.
In FIG. 1 a network switch 10 for a local area network 11 is coupled to a plurality of workstations 12′-12 n for transmitting/receiving data packets or frames to be transmitted/received to/from a multi-port server 14. Each workstation includes a Network Interface Card 16′ . . . 16 n for transmitting and receiving data packets to and from the server 14. Each workstation is associated with a switch input port 18′ . . . 18 n. The switch 10 includes a plurality of destination output ports 20′ . . . 20 n, each output port associated with server Network Interface Card 22′ . . . 22 n through a channel 24′ . . . 24 n. The switch 10 is adapted, as will be described hereinafter, to associate a destination port 20′ with the server address whereby whenever the switch transmits a data frame or packet from a workstation to a network destination address associated with the server, the switch will route the frame to a particular output or destination port of the switch that is connected to a Network Interface Card in the server.
In FIG. 2, an IBM Token-ring Network Frame Format 28 includes a routing header field 30 which is prepended to the data frame 28 by the switch 10, as will be described hereinafter. The routing header 30 is assigned a value associated with a switch destination port 20′ connected to a server Network Interface Card. The data frame 28 includes a start delimiter 32; access control field 34 and frame control field 36. A destination address field 38; source address field 40 and information field 42 precede a frame check sequence field 44; end delimiter 46 and frame status field 48. An end of packet indicator 50 is also appended to the frame 28 by the switch to further identify the routing header 30. Both the routing header 30 and end of packet indicator 50 are stripped from the frame by the switch before transmission of the data frame to the output port 20′, as will be further described hereinafter.
The switch transmits the data frame or packet to the server 14 through a destination port 20′ serving the MAC address for the frame. An address is returned by the server to the workstation. The address returned to the workstation is always the address of the first Network Interface Card installed in the server and is not assigned in a round-robin order as in the case of static load balancing for servers.
In FIG. 3, each workstation Network Interface Card 16′ . . . 16 n (See FIG. 1) is connected to an associated switch input port 18′ — . . . 18 n, all input ports being connected to a server address locator (not shown) which associates a switch destination port number with a MAC address in a data frame transmitted by the workstation to the switch, as will be described in conjunction with FIG. 4. Each input port is also connected to an output or destination port 20′ . . . 20 n through a cross-connect switch 52. Each destination port 20′ is connected to a server network interface card 22′ though a channel 24′ (See FIG. 1) and to an input port 18′ through a control signal bus 54. Each output or destination port is assigned a value which is selected by the switch 52 according to the header code shown in the table 56 and embodied in the data frame.
In FIG. 4, a destination address locator 60, connected to the switch 52 and the control signal bus 52, includes a microprocessor or application specific integrated circuit (ASIC) 62 coupled to a content addressable memory (CAM) 64 and a random access memory (RAM) 66. The microprocessor 62 stores a destination address field 38 for a data frame 28 (See FIG. 2) in the content addressable memory 64. The address stored in CAM 64 is used as an entry into a table look-up contained in the RAM 66. The table look-up provides a code which indicates the address of the network interface card with which the transmitting workstation wishes to communicate. The code is embodied in the header 30 (See FIG. 2) is prepended to the frame by the processor 62 before transmitting the frame to the cross-connect switch 52. The destination port number is provided as an input to the switch 52 which directs the processor to supply the packet to the designated output port.
In the event of a hardware failure, for example, a NIC or cable failure existing load balancing software in prior art networks detect the problem and distribute the traffic through the remaining operational NICs. If the failed NIC is repaired and brought back on line, existing load balancing solutions dynamically restore balancing of packets outbound from the server only. Static balancing of packets inbound to the server only occur on a subsequent login of the client workstations. The login process may not occur for many hours or even days, resulting in reduced network performance in the interim. In contrast, the present invention immediately redistributes the traffic both inbound and outbound yielding full duplex dynamic balancing.
Now turning to FIGS. 5A and 5B, the process for dynamically balancing inbound and outbound data packets to and from a server will be described, as follows
In FIG. 5A the network switch 10 is activated for processing messages between the workstations and the server.
The switch activation process is entered in a step 501, in which the switch is initialized from a “master” processor after power on or manual reset. The processor sets the communication channel speeds and defines any channel groups.
In step 503, the switch transmits on the network an address resolution protocol which maps all MAC addresses connected to each communication channel.
In step 505, a work station queries the network for a MAC address of a server with which it wishes to communicate by sending a data frame to a “Name Server” at a known address fixed by a network administrator or by convention.
In step 507, the queried server responds with the MAC address of the first network interface card installed in the server.
In step 509, the work station updates its address table with the MAC address provided by the queried server, and the switch activation process ends.
In FIG. 5B the network data flow process is entered in at step 502 in which a workstation sends a data frame to the switch, the frame including a destination address for the server with which it wishes to communicate.
In step 504, the switch includes a Media Access Controller chip (not shown) which receives the destination address followed by the remainder of the data frame.
In step 506, a header is generated for the data frame from the destination address via the CAM/RAM lookup or other switch mapping method.
In step 508, the header is appended to the data frame together with an end of packet indicator in the locator 60, and transmitted to the cross-connect switch 54.
In step 510, the switch 54 tests the header to determine that the data frame matches the designated switch output for the destination address included in the data frame.
In step 512, the switch 54 tests that a destination port does not have a unique output routing, e.g. is part of a group and whether the destination port is currently busy. If the specified output or destination port is free, the packet is sent to the specified output port or destination port.
In step 514, If the specified output port is busy, the switch 54 checks to determine if other output ports are grouped with the specified output port.
In step 516, before the data frame is sent to the specified output port, the header and end of packet indicator are stripped from the frame.
In step 518, if another port is grouped with the busy port, steps 512 and 514 are repeated with the grouped port as the destination of the data frame.
In step 520, if there are no additional ports grouped with the busy port, the data frame is stalled until the specified port or port in the same group becomes available.
In step 522, the packet is transmitted to the first NIC channel of the server, which if busy transfers the packet to the second, third, etc. NIC available to send the packet to the destination address, after which the process ends. In this manner, the packet load on the server is dynamically balanced, that is the packet load is distributed among the server NICs according to their workload which improves network latency and throughput.
While the invention has been described in a specific embodiment, it is apparent that various modifications may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A communications network including:
a server having a plurality of entry ports;
a plurality of workstations;
a network switch coupling the server to the plurality of workstations;
a Network Interface Card in at least one of the workstations for sending data frames including network destination addresses to the network switch;
a destination address locator, positioned in said network switch, using a network destination address in said frame to generate and record an indicia in said frame representative of a port whereat the server is coupled to said network switch;
a switch controller correlating the indicia in said frame with entries in a switch route table and routing the frame to an output port associated with an entry in said switch route table that matches the indicia or to another port in a group of ports associated with the output port if said output port is busy.
2. The apparatus of claim 1 wherein the switch controller sequentially monitors the output port and group of ports to determine a non-busy port through which the frame is routed.
3. In a communications network including a server having multiple entry ports coupled to a plurality of workstations through a network switch, a method of dynamically balancing in-bound and out-bound messages to/from the multiple entry port server comprising the steps of:
a) transmitting data packets including network destination addresses to the network switch;
a1) associating multiple ports of the server with multiple output ports of said switch;
b) appending a header to the data frame, the header identifying one of the multiple output ports of said switch as destination port for transmitting one of the data packets;
c) examining a port entry bit associated with one of the multiple output ports to determine if said output port is busy;
d) if the switch output port is busy, sequentially monitoring the multiple output ports to detect a non-busy one; and
e) routing the frame through the non-busy one to the server.
4. The method of claim 3 further including the steps if the switch output port is not busy routing the data frame through said not-busy output port; and
removing the routing header prior to the data frame exiting the switch.
5. In a communications network including a server having multiple ports with each one coupled to a port of a switch and said switch coupled through other ones of its ports to a plurality of workstations, a method for dynamically balancing inbound and outbound messages to/from the server including the steps of:
a) receiving in said switch a message including a destination address;
b) determining if the destination address is that of the server;
b1) determining a group of switch output ports coupled to the server;
c) if the destination address is the address of the server, sequentially monitoring ports in the switch output group of ports to detect a non-busy one; and
d) routing the frame through the selected non-busy one of the group of ports.
6. A network switch comprising:
at least one input port that receives frame;
a plurality of output ports some of which are grouped to provide service to one device;
a destination address locator responsive to addresses in each of the received frames to generate and record header indicia in said each one of the received frames wherein the indicia relates to an output port to which the frame is to be routed;
a switch route table including header indicia entries and associated output port number entries; and
a switch controller correlating header indicia in each frame with entries in the switch route table and routing the frame to an output port corresponding to matched entries or to a non-busy port in ports grouped with output port if the output port is busy.
7. The network switch of claim 6 wherein the device includes a server.
8. The network switch of claim 7 further including a content addressable memory and a random access memory for associating a network switch port with a network interface Card in the server.
9. The network switch of claim 6 further including:
a) means for indicating that a destination port does not have a unique output routing; and
b) means for indicating that the destination port is currently busy.
10. The network switch of claim 6 further including a switch fabric coupled to the at least one input port and the plurality of output ports and a control signal bus linking input and output ports.
11. The network switch of claim 6 wherein the destination address locator includes:
a Contents Address Memory (CAM);
a Random Address Memory (RAM), operatively coupled to the CAM; and
a CAM/RAM controller that conducts control search of said CAM and RAM to identify the header indicia.
12. The network switch of claim 11 wherein the CAM/RAM controller includes a processor or Application Specific Integrated Circuit (ASIC).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/157,740 US6243360B1 (en) | 1996-09-18 | 1998-09-21 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/715,506 US5864535A (en) | 1996-09-18 | 1996-09-18 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
US09/157,740 US6243360B1 (en) | 1996-09-18 | 1998-09-21 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/715,506 Division US5864535A (en) | 1996-09-18 | 1996-09-18 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
Publications (1)
Publication Number | Publication Date |
---|---|
US6243360B1 true US6243360B1 (en) | 2001-06-05 |
Family
ID=24874308
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/715,506 Expired - Lifetime US5864535A (en) | 1996-09-18 | 1996-09-18 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
US09/157,740 Expired - Lifetime US6243360B1 (en) | 1996-09-18 | 1998-09-21 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/715,506 Expired - Lifetime US5864535A (en) | 1996-09-18 | 1996-09-18 | Network server having dynamic load balancing of messages in both inbound and outbound directions |
Country Status (1)
Country | Link |
---|---|
US (2) | US5864535A (en) |
Cited By (67)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6490632B1 (en) * | 1999-03-18 | 2002-12-03 | 3Com Corporation | High performance load balancing and fail over support of internet protocol exchange traffic over multiple network interface cards |
US20030023733A1 (en) * | 2001-07-26 | 2003-01-30 | International Business Machines Corporation | Apparatus and method for using a network processor to guard against a "denial-of-service" attack on a server or server cluster |
US6519231B1 (en) * | 1999-01-12 | 2003-02-11 | Nortel Networks Limited | Method and apparatus providing a spanning tree protocol for a data communications network having a multi-link trunk |
US20030037142A1 (en) * | 1998-10-30 | 2003-02-20 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US6526452B1 (en) * | 1998-11-17 | 2003-02-25 | Cisco Technology, Inc. | Methods and apparatus for providing interfaces for mixed topology data switching system |
WO2003019881A1 (en) * | 2001-08-22 | 2003-03-06 | Spatial Communication Technologies, Inc. | Method and system for processing load distribution for a packetized telecommunication network entity |
US20030063594A1 (en) * | 2001-08-13 | 2003-04-03 | Via Technologies, Inc. | Load balance device and method for packet switching |
US6556541B1 (en) * | 1999-01-11 | 2003-04-29 | Hewlett-Packard Development Company, L.P. | MAC address learning and propagation in load balancing switch protocols |
US6560630B1 (en) * | 1999-03-18 | 2003-05-06 | 3Com Corporation | Receive load balancing and fail over with multiple network interface cards |
US6560229B1 (en) * | 1998-07-08 | 2003-05-06 | Broadcom Corporation | Network switching architecture with multiple table synchronization, and forwarding of both IP and IPX packets |
US20030135639A1 (en) * | 2002-01-14 | 2003-07-17 | Richard Marejka | System monitoring service using throttle mechanisms to manage data loads and timing |
US20030147387A1 (en) * | 2002-02-01 | 2003-08-07 | Fujitsu Network Communications, Inc. | Forwarding packets to aggregated links using distributed ingress card processing |
US20030200341A1 (en) * | 1999-12-30 | 2003-10-23 | Nortel Networks Corporation, A Canadian Corporation | Port switch |
US20030200477A1 (en) * | 2002-04-17 | 2003-10-23 | International Business Machines Corporation | Method, system, and program for selecting a path to a device to use when sending data requests to the device |
US6665673B1 (en) | 1998-11-17 | 2003-12-16 | Cisco Technology, Inc. | Channel communication system |
US20040003116A1 (en) * | 1998-10-30 | 2004-01-01 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US6675222B1 (en) | 1998-11-17 | 2004-01-06 | Cisco Technology, Inc. | Network mixed topology data switching with interconnect to provide storing and retrieving of data using a switch and interconnect to provide network notifications |
US20040006622A1 (en) * | 2002-07-03 | 2004-01-08 | Burkes Don L. | Optimized process for balancing load for data mirroring |
US20040071142A1 (en) * | 2002-10-11 | 2004-04-15 | Hitachi, Ltd. | Packet communication device |
US6760331B1 (en) * | 1999-03-31 | 2004-07-06 | Cisco Technology, Inc. | Multicast routing with nearest queue first allocation and dynamic and static vector quantization |
US6775280B1 (en) * | 1999-04-29 | 2004-08-10 | Cisco Technology, Inc. | Methods and apparatus for routing packets using policy and network efficiency information |
US6789127B1 (en) * | 2000-02-15 | 2004-09-07 | Lucent Technologies Inc. | Preparation for network interface recognition of network packet portion with declarative notation for field thereof and constraint therefor |
US6801949B1 (en) * | 1999-04-12 | 2004-10-05 | Rainfinity, Inc. | Distributed server cluster with graphical user interface |
US20040215703A1 (en) * | 2003-02-18 | 2004-10-28 | Xiping Song | System supporting concurrent operation of multiple executable application operation sessions |
US20040221065A1 (en) * | 2003-04-30 | 2004-11-04 | International Business Machines Corporation | Apparatus and method for dynamic sharing of server network interface resources |
US20040257990A1 (en) * | 2003-06-19 | 2004-12-23 | International Business Machines Corporation | Interchassis switch controlled ingress transmission capacity |
US20040260745A1 (en) * | 2003-06-18 | 2004-12-23 | Gage Christopher A. S. | Load balancer performance using affinity modification |
US20050063395A1 (en) * | 2003-09-18 | 2005-03-24 | Cisco Technology, Inc. | Virtual network device |
US20050091396A1 (en) * | 2003-08-05 | 2005-04-28 | Chandrasekharan Nilakantan | Method and apparatus for achieving dynamic capacity and high availability in multi-stage data networks using adaptive flow-based routing |
WO2005043842A1 (en) * | 2003-10-21 | 2005-05-12 | Cicso Technology, Inc. | Port-based loadsharing for an access-layer switch |
US20050163115A1 (en) * | 2003-09-18 | 2005-07-28 | Sitaram Dontu | Distributed forwarding in virtual network devices |
US20050198371A1 (en) * | 2004-02-19 | 2005-09-08 | Smith Michael R. | Interface bundles in virtual network devices |
US20050243826A1 (en) * | 2004-04-28 | 2005-11-03 | Smith Michael R | Intelligent adjunct network device |
US20060023718A1 (en) * | 2004-07-08 | 2006-02-02 | Christophe Joly | Network device architecture for centralized packet processing |
US20060039384A1 (en) * | 2004-08-17 | 2006-02-23 | Sitaram Dontu | System and method for preventing erroneous link aggregation due to component relocation |
US7062571B1 (en) * | 2000-06-30 | 2006-06-13 | Cisco Technology, Inc. | Efficient IP load-balancing traffic distribution using ternary CAMs |
US7131140B1 (en) * | 2000-12-29 | 2006-10-31 | Cisco Technology, Inc. | Method for protecting a firewall load balancer from a denial of service attack |
US7159034B1 (en) | 2003-03-03 | 2007-01-02 | Novell, Inc. | System broadcasting ARP request from a server using a different IP address to balance incoming traffic load from clients via different network interface cards |
US20070002738A1 (en) * | 2005-06-29 | 2007-01-04 | Mcgee Michael S | Method and apparatus for load balancing network interface adapters based on network information |
US7161945B1 (en) * | 1999-08-30 | 2007-01-09 | Broadcom Corporation | Cable modem termination system |
US20070217450A1 (en) * | 2006-03-14 | 2007-09-20 | Fujitsu Limited | Broadcast processing method for network system and network system |
US7299294B1 (en) | 1999-11-10 | 2007-11-20 | Emc Corporation | Distributed traffic controller for network data |
US20080005792A1 (en) * | 1998-10-30 | 2008-01-03 | Science Applications International Corporation | Method for establishing secure communication link between computers of virtual private network |
US20080040783A1 (en) * | 1998-10-30 | 2008-02-14 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US7349979B1 (en) * | 1999-12-02 | 2008-03-25 | Cisco Technology, Inc. | Method and apparatus for redirecting network traffic |
US7392318B1 (en) * | 2003-03-21 | 2008-06-24 | Novell, Inc. | Method and system for balancing a traffic load in a half-duplex environment |
US20090086641A1 (en) * | 2004-06-30 | 2009-04-02 | Faisal Mushtaq | Method and Apparatus for Detecting Support for A Protocol Defining Supplemental Headers |
US7593346B2 (en) | 2003-07-31 | 2009-09-22 | Cisco Technology, Inc. | Distributing and balancing traffic flow in a virtual gateway |
US20100011230A1 (en) * | 2008-07-08 | 2010-01-14 | Olaf Mater | Link aggregation with dynamic bandwidth management to reduce power consumption |
US20100057707A1 (en) * | 2008-09-03 | 2010-03-04 | Microsoft Corporation | Query-oriented message characterization |
US20100057933A1 (en) * | 2008-09-03 | 2010-03-04 | Microsoft Corporation | Probabilistic mesh routing |
US7706364B2 (en) | 2004-05-19 | 2010-04-27 | Cisco Technology, Inc. | Virtual network device clusters |
US7710957B2 (en) | 2004-05-19 | 2010-05-04 | Cisco Technology, Inc. | System and method for implementing multiple spanning trees per network |
US7881208B1 (en) | 2001-06-18 | 2011-02-01 | Cisco Technology, Inc. | Gateway load balancing protocol |
US7966409B1 (en) | 2000-01-18 | 2011-06-21 | Cisco Technology, Inc. | Routing protocol based redundancy design for shared-access networks |
US20110199925A1 (en) * | 2000-09-06 | 2011-08-18 | Juniper Networks, Inc. | Packet switching equipment and switching control method |
US8077604B1 (en) | 1999-06-29 | 2011-12-13 | Cisco Technology, Inc. | Load sharing and redundancy scheme |
US8208370B1 (en) | 2004-03-31 | 2012-06-26 | Cisco Technology, Inc. | Method and system for fast link failover |
US20130198411A1 (en) * | 2012-01-27 | 2013-08-01 | Electronics And Telecommunications Research Institute | Packet processing apparatus and method for load balancing of multi-layered protocols |
USRE44661E1 (en) | 2000-01-18 | 2013-12-24 | Cisco Technology, Inc. | Method for a cable modem to rapidly switch to a backup CMTS |
US20140050217A1 (en) * | 2012-08-20 | 2014-02-20 | Cisco Technology, Inc. | Two-Stage Port-Channel Resolution in a Multistage Fabric Switch |
US20140161137A1 (en) * | 2012-12-10 | 2014-06-12 | Dell Products L.P. | Systems and methods for automating virtual network interface controller configuration during workload provisioning |
US8824477B2 (en) | 2011-11-03 | 2014-09-02 | Qualcomm Incorporated | Multiple delivery route packet ordering |
US8976666B2 (en) * | 2013-07-25 | 2015-03-10 | Iboss, Inc. | Load balancing network adapter |
US9059932B2 (en) | 2011-11-03 | 2015-06-16 | Qualcomm Incorporated | Packet ordering based on delivery route changes in communication networks |
CN109309636A (en) * | 2017-07-27 | 2019-02-05 | 西门子瑞士有限公司 | The network switch |
US10511573B2 (en) | 1998-10-30 | 2019-12-17 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
Families Citing this family (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998045995A1 (en) * | 1997-04-09 | 1998-10-15 | Alcatel Australia Limited | Internet closed user group |
US6351775B1 (en) * | 1997-05-30 | 2002-02-26 | International Business Machines Corporation | Loading balancing across servers in a computer network |
US6263368B1 (en) * | 1997-06-19 | 2001-07-17 | Sun Microsystems, Inc. | Network load balancing for multi-computer server by counting message packets to/from multi-computer server |
US5966534A (en) * | 1997-06-27 | 1999-10-12 | Cooke; Laurence H. | Method for compiling high level programming languages into an integrated processor with reconfigurable logic |
US6151297A (en) * | 1997-07-08 | 2000-11-21 | Hewlett-Packard Company | Method and system for link level server/switch trunking |
JP3369445B2 (en) * | 1997-09-22 | 2003-01-20 | 富士通株式会社 | Network service server load adjusting device, method and recording medium |
US6216167B1 (en) * | 1997-10-31 | 2001-04-10 | Nortel Networks Limited | Efficient path based forwarding and multicast forwarding |
US6421317B1 (en) * | 1997-11-07 | 2002-07-16 | International Business Machines Corporation | Method and apparatus for an automatic load balancing and back-up of a multi-users network |
US6363077B1 (en) * | 1998-02-13 | 2002-03-26 | Broadcom Corporation | Load balancing in link aggregation and trunking |
US6449283B1 (en) * | 1998-05-15 | 2002-09-10 | Polytechnic University | Methods and apparatus for providing a fast ring reservation arbitration |
US6667984B1 (en) | 1998-05-15 | 2003-12-23 | Polytechnic University | Methods and apparatus for arbitrating output port contention in a switch having virtual output queuing |
US6516352B1 (en) * | 1998-08-17 | 2003-02-04 | Intel Corporation | Network interface system and method for dynamically switching between different physical layer devices |
US6272113B1 (en) * | 1998-09-11 | 2001-08-07 | Compaq Computer Corporation | Network controller system that uses multicast heartbeat packets |
US6631115B1 (en) * | 1999-01-28 | 2003-10-07 | International Business Machines Corporation | Method, apparatus and program product for balancing communication loads over a network |
US6590861B1 (en) * | 1999-03-18 | 2003-07-08 | 3Com Corporation | Combining virtual local area networks and load balancing with fault tolerance in a high performance protocol |
US6512774B1 (en) * | 1999-03-18 | 2003-01-28 | 3Com Corporation | Fail over with multiple network interface cards |
US6788692B1 (en) * | 1999-05-03 | 2004-09-07 | Nortel Networks Limited | Network switch load balancing |
ATE450955T1 (en) * | 1999-05-24 | 2009-12-15 | Broadcom Corp | DEVICE FOR DISTRIBUTING LOAD OVER A LINE GROUP |
US6378014B1 (en) * | 1999-08-25 | 2002-04-23 | Apex Inc. | Terminal emulator for interfacing between a communications port and a KVM switch |
US6766381B1 (en) | 1999-08-27 | 2004-07-20 | International Business Machines Corporation | VLSI network processor and methods |
US6769033B1 (en) | 1999-08-27 | 2004-07-27 | International Business Machines Corporation | Network processor processing complex and methods |
US6985431B1 (en) * | 1999-08-27 | 2006-01-10 | International Business Machines Corporation | Network switch and components and method of operation |
US6791969B1 (en) * | 1999-09-15 | 2004-09-14 | Lucent Technologies Inc. | Multiple input/output switch |
US6748414B1 (en) * | 1999-11-15 | 2004-06-08 | International Business Machines Corporation | Method and apparatus for the load balancing of non-identical servers in a network environment |
US6748413B1 (en) | 1999-11-15 | 2004-06-08 | International Business Machines Corporation | Method and apparatus for load balancing of parallel servers in a network environment |
AU1754801A (en) | 1999-11-18 | 2001-05-30 | Broadcom Corporation | Table lookup mechanism for address resolution in a packet network switch |
US6389448B1 (en) | 1999-12-06 | 2002-05-14 | Warp Solutions, Inc. | System and method for load balancing |
AU4717901A (en) | 1999-12-06 | 2001-06-25 | Warp Solutions, Inc. | System and method for dynamic content routing |
US6832265B1 (en) | 2000-01-07 | 2004-12-14 | Cisco Technology, Inc. | Methods and apparatus for moving data elements within a data communications device |
US7095746B1 (en) * | 2000-06-14 | 2006-08-22 | Arris International, Inc. | Method and apparatus for sub-network devices without direct layer-2 communication and coupled to a common forwarding agent interface to communicate through layer-3 |
US6754704B1 (en) | 2000-06-21 | 2004-06-22 | International Business Machines Corporation | Methods, systems, and computer program product for remote monitoring of a data processing system events |
US7016484B2 (en) * | 2000-10-13 | 2006-03-21 | Verizon Corporate Services Group Inc. | System and method for effecting inside plant load balancing in a telecommunications system |
US20020097717A1 (en) * | 2001-01-22 | 2002-07-25 | Vinsel Peter C. | Microkernel architecture-based forwarder |
US20030236813A1 (en) * | 2002-06-24 | 2003-12-25 | Abjanic John B. | Method and apparatus for off-load processing of a message stream |
US7451209B1 (en) | 2003-10-22 | 2008-11-11 | Cisco Technology, Inc. | Improving reliability and availability of a load balanced server |
US7421695B2 (en) * | 2003-11-12 | 2008-09-02 | Cisco Tech Inc | System and methodology for adaptive load balancing with behavior modification hints |
US7616653B1 (en) * | 2004-09-02 | 2009-11-10 | Sun Microsystems, Inc. | Network interface card aggregation framework |
US8134928B1 (en) | 2005-12-15 | 2012-03-13 | Nvidia Corporation | Technique for identifying a failed network interface card within a team of network interface cards |
US8427489B2 (en) | 2006-08-10 | 2013-04-23 | Avocent Huntsville Corporation | Rack interface pod with intelligent platform control |
US8009173B2 (en) | 2006-08-10 | 2011-08-30 | Avocent Huntsville Corporation | Rack interface pod with intelligent platform control |
US8300647B2 (en) * | 2007-05-18 | 2012-10-30 | Nvidia Corporation | Intelligent load balancing and failover of network traffic |
US7756012B2 (en) * | 2007-05-18 | 2010-07-13 | Nvidia Corporation | Intelligent failover in a load-balanced network environment |
US7760619B2 (en) * | 2007-05-18 | 2010-07-20 | Nvidia Corporation | Intelligent failover in a load-balanced networking environment |
US7792018B2 (en) * | 2007-05-18 | 2010-09-07 | Nvidia Corporation | Intelligent load balancing and failover of network traffic |
US8432788B2 (en) * | 2007-05-18 | 2013-04-30 | Nvidia Corporation | Intelligent failback in a load-balanced networking environment |
US7995465B2 (en) * | 2007-05-18 | 2011-08-09 | Nvidia Corporation | Intelligent load balancing and failover of network traffic |
US8041008B2 (en) * | 2009-01-29 | 2011-10-18 | The Invention Science Fund I, Llc | Diagnostic delivery service |
US8130754B2 (en) * | 2009-07-10 | 2012-03-06 | Hewlett-Packard Development Company, L.P. | On-chip and chip-to-chip routing using a processor element/router combination |
US9888064B2 (en) * | 2015-02-11 | 2018-02-06 | International Business Machines Corporation | Load-balancing input/output requests in clustered storage systems |
CN106998269B (en) * | 2017-04-24 | 2020-03-24 | 上海网达软件股份有限公司 | Configuration method and system of multiple network cards in online transcoding system |
US11245753B2 (en) * | 2018-08-17 | 2022-02-08 | Fastly, Inc. | User space redirect of packet traffic |
CN109347768A (en) * | 2018-10-31 | 2019-02-15 | 四川中企互信信息技术有限公司 | A kind of method for switching network applied to double netcard |
US11233730B2 (en) * | 2019-07-09 | 2022-01-25 | Nvidia Corporation | Network routing using aggregated links |
US11146491B1 (en) | 2020-04-09 | 2021-10-12 | International Business Machines Corporation | Dynamically balancing inbound traffic in a multi-network interface-enabled processing system |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5025491A (en) | 1988-06-23 | 1991-06-18 | The Mitre Corporation | Dynamic address binding in communication networks |
US5031089A (en) | 1988-12-30 | 1991-07-09 | United States Of America As Represented By The Administrator, National Aeronautics And Space Administration | Dynamic resource allocation scheme for distributed heterogeneous computer systems |
US5193151A (en) | 1989-08-30 | 1993-03-09 | Digital Equipment Corporation | Delay-based congestion avoidance in computer networks |
US5241677A (en) | 1986-12-19 | 1993-08-31 | Nippon Telepgraph and Telehone Corporation | Multiprocessor system and a method of load balancing thereof |
US5249290A (en) | 1991-02-22 | 1993-09-28 | At&T Bell Laboratories | Method of and apparatus for operating a client/server computer network |
US5271003A (en) | 1989-03-11 | 1993-12-14 | Electronics And Telecommunications Research Institute | Internal routing method for load balancing |
US5293488A (en) | 1991-09-03 | 1994-03-08 | Hewlett-Packard Company | Message-routing apparatus |
US5371852A (en) | 1992-10-14 | 1994-12-06 | International Business Machines Corporation | Method and apparatus for making a cluster of computers appear as a single host on a network |
US5386413A (en) * | 1993-03-19 | 1995-01-31 | Bell Communications Research, Inc. | Fast multilevel hierarchical routing table lookup using content addressable memory |
GB2281793A (en) | 1993-09-11 | 1995-03-15 | Ibm | A data processing system for providing user load levelling in a network |
US5583868A (en) * | 1994-07-25 | 1996-12-10 | Microsoft Corporation | Method and system for combining data from multiple servers into a single continuous data stream using a switch |
US5918021A (en) * | 1996-06-03 | 1999-06-29 | Intel Corporation | System and method for dynamic distribution of data packets through multiple channels |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4845722A (en) * | 1987-10-16 | 1989-07-04 | Digital Equipment Corporation | Computer interconnect coupler employing crossbar switching |
US4887076A (en) * | 1987-10-16 | 1989-12-12 | Digital Equipment Corporation | Computer interconnect coupler for clusters of data processing devices |
-
1996
- 1996-09-18 US US08/715,506 patent/US5864535A/en not_active Expired - Lifetime
-
1998
- 1998-09-21 US US09/157,740 patent/US6243360B1/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5241677A (en) | 1986-12-19 | 1993-08-31 | Nippon Telepgraph and Telehone Corporation | Multiprocessor system and a method of load balancing thereof |
US5025491A (en) | 1988-06-23 | 1991-06-18 | The Mitre Corporation | Dynamic address binding in communication networks |
US5031089A (en) | 1988-12-30 | 1991-07-09 | United States Of America As Represented By The Administrator, National Aeronautics And Space Administration | Dynamic resource allocation scheme for distributed heterogeneous computer systems |
US5271003A (en) | 1989-03-11 | 1993-12-14 | Electronics And Telecommunications Research Institute | Internal routing method for load balancing |
US5193151A (en) | 1989-08-30 | 1993-03-09 | Digital Equipment Corporation | Delay-based congestion avoidance in computer networks |
US5249290A (en) | 1991-02-22 | 1993-09-28 | At&T Bell Laboratories | Method of and apparatus for operating a client/server computer network |
US5293488A (en) | 1991-09-03 | 1994-03-08 | Hewlett-Packard Company | Message-routing apparatus |
US5371852A (en) | 1992-10-14 | 1994-12-06 | International Business Machines Corporation | Method and apparatus for making a cluster of computers appear as a single host on a network |
US5386413A (en) * | 1993-03-19 | 1995-01-31 | Bell Communications Research, Inc. | Fast multilevel hierarchical routing table lookup using content addressable memory |
GB2281793A (en) | 1993-09-11 | 1995-03-15 | Ibm | A data processing system for providing user load levelling in a network |
US5583868A (en) * | 1994-07-25 | 1996-12-10 | Microsoft Corporation | Method and system for combining data from multiple servers into a single continuous data stream using a switch |
US5918021A (en) * | 1996-06-03 | 1999-06-29 | Intel Corporation | System and method for dynamic distribution of data packets through multiple channels |
Non-Patent Citations (1)
Title |
---|
IBM Technical Disclosure Bulletin, vol. 37, No. 7, Jul. 1994, by D.M. Geise "Dynamic Load Balancing in a Cluster of Loosely Coupled Systems" (AT893-0897). |
Cited By (161)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6560229B1 (en) * | 1998-07-08 | 2003-05-06 | Broadcom Corporation | Network switching architecture with multiple table synchronization, and forwarding of both IP and IPX packets |
US7415022B2 (en) | 1998-07-08 | 2008-08-19 | Broadcom Corporation | Network switching architecture with multiple table synchronization, and forwarding of both IP and IPX packets |
US20060262791A1 (en) * | 1998-07-08 | 2006-11-23 | Broadcom Corporation | Network switching architecture with multiple table synchronization, and forwarding of both IP and IPX packets |
US7106734B2 (en) | 1998-07-08 | 2006-09-12 | Broadcom Corporation | Network switching architecture with multiple table synchronization, and forwarding of both IP and IPX packets |
US20030189924A1 (en) * | 1998-07-08 | 2003-10-09 | Broadcom Corporation | Network switching architecture with multiple table synchronization, and forwarding of both IP and IPX packets |
US20080216168A1 (en) * | 1998-10-30 | 2008-09-04 | Virnetx, Inc. | Method for establishing secure communication link between computers of virtual private network |
US7133930B2 (en) * | 1998-10-30 | 2006-11-07 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US7945654B2 (en) | 1998-10-30 | 2011-05-17 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US7933990B2 (en) | 1998-10-30 | 2011-04-26 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US8572247B2 (en) | 1998-10-30 | 2013-10-29 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US8504696B2 (en) | 1998-10-30 | 2013-08-06 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US8516131B2 (en) | 1998-10-30 | 2013-08-20 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US8843643B2 (en) | 1998-10-30 | 2014-09-23 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US8850009B2 (en) | 1998-10-30 | 2014-09-30 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US8868705B2 (en) | 1998-10-30 | 2014-10-21 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US8516117B2 (en) | 1998-10-30 | 2013-08-20 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US8874771B2 (en) | 1998-10-30 | 2014-10-28 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US20040003116A1 (en) * | 1998-10-30 | 2004-01-01 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US8904516B2 (en) | 1998-10-30 | 2014-12-02 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US8458341B2 (en) | 1998-10-30 | 2013-06-04 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US20130219174A1 (en) * | 1998-10-30 | 2013-08-22 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US8943201B2 (en) | 1998-10-30 | 2015-01-27 | Virnetx, Inc. | Method for establishing encrypted channel |
US9027115B2 (en) | 1998-10-30 | 2015-05-05 | Virnetx, Inc. | System and method for using a registered name to connect network devices with a link that uses encryption |
US9038163B2 (en) | 1998-10-30 | 2015-05-19 | Virnetx, Inc. | Systems and methods for connecting network devices over communication network |
US9037713B2 (en) | 1998-10-30 | 2015-05-19 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US9077695B2 (en) | 1998-10-30 | 2015-07-07 | Virnetx, Inc. | System and method for establishing an encrypted communication link based on IP address lookup requests |
US8521888B2 (en) | 1998-10-30 | 2013-08-27 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US20110167087A1 (en) * | 1998-10-30 | 2011-07-07 | VirtnetX, Inc. | agile network protocol for secure communications using secure domain names |
US9077694B2 (en) | 1998-10-30 | 2015-07-07 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US8554899B2 (en) | 1998-10-30 | 2013-10-08 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US10511573B2 (en) | 1998-10-30 | 2019-12-17 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US10187387B2 (en) | 1998-10-30 | 2019-01-22 | Virnetx, Inc. | Method for establishing connection between devices |
US20080034201A1 (en) * | 1998-10-30 | 2008-02-07 | Virnetx, Inc. | agile network protocol for secure communications with assured system availability |
US9860283B2 (en) | 1998-10-30 | 2018-01-02 | Virnetx, Inc. | Agile network protocol for secure video communications with assured system availability |
US9819649B2 (en) | 1998-10-30 | 2017-11-14 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US9094399B2 (en) | 1998-10-30 | 2015-07-28 | Virnetx, Inc. | Method for establishing secure communication link between computers of virtual private network |
US8051181B2 (en) | 1998-10-30 | 2011-11-01 | Virnetx, Inc. | Method for establishing secure communication link between computers of virtual private network |
US9479426B2 (en) | 1998-10-30 | 2016-10-25 | Virnetz, Inc. | Agile network protocol for secure communications with assured system availability |
US20110238993A1 (en) * | 1998-10-30 | 2011-09-29 | Virnetx, Inc. | Agile Network Protocol For Secure Communications With Assured System Availability |
US9413766B2 (en) | 1998-10-30 | 2016-08-09 | Virnetx, Inc. | Method for establishing connection between devices |
US9386000B2 (en) | 1998-10-30 | 2016-07-05 | Virnetx, Inc. | System and method for establishing a communication link |
US7010604B1 (en) * | 1998-10-30 | 2006-03-07 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US7490151B2 (en) | 1998-10-30 | 2009-02-10 | Virnetx Inc. | Establishment of a secure communication link based on a domain name service (DNS) request |
US20060123134A1 (en) * | 1998-10-30 | 2006-06-08 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US9100375B2 (en) | 1998-10-30 | 2015-08-04 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US20030037142A1 (en) * | 1998-10-30 | 2003-02-20 | Science Applications International Corporation | Agile network protocol for secure communications with assured system availability |
US20080222415A1 (en) * | 1998-10-30 | 2008-09-11 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US8560705B2 (en) | 1998-10-30 | 2013-10-15 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US9967240B2 (en) | 1998-10-30 | 2018-05-08 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US7418504B2 (en) | 1998-10-30 | 2008-08-26 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US7996539B2 (en) | 1998-10-30 | 2011-08-09 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US9374346B2 (en) | 1998-10-30 | 2016-06-21 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US7987274B2 (en) | 1998-10-30 | 2011-07-26 | Virnetx, Incorporated | Method for establishing secure communication link between computers of virtual private network |
US8504697B2 (en) | 1998-10-30 | 2013-08-06 | Virnetx, Inc. | System and method employing an agile network protocol for secure communications using secure domain names |
US20110191582A1 (en) * | 1998-10-30 | 2011-08-04 | Edmund Colby Munger | Agile Network Protocol For Secure Communications With Assured System Availability |
US20080040783A1 (en) * | 1998-10-30 | 2008-02-14 | Virnetx, Inc. | Agile network protocol for secure communications using secure domain names |
US20110185169A1 (en) * | 1998-10-30 | 2011-07-28 | Edmund Colby Munger | Agile Network Protocol For Secure Communications With Assured System Availability. |
US20080040791A1 (en) * | 1998-10-30 | 2008-02-14 | Virnetx, Inc. | Agile network protocol for secure communications with assured system availability |
US20080005792A1 (en) * | 1998-10-30 | 2008-01-03 | Science Applications International Corporation | Method for establishing secure communication link between computers of virtual private network |
US6665673B1 (en) | 1998-11-17 | 2003-12-16 | Cisco Technology, Inc. | Channel communication system |
US6526452B1 (en) * | 1998-11-17 | 2003-02-25 | Cisco Technology, Inc. | Methods and apparatus for providing interfaces for mixed topology data switching system |
US6675222B1 (en) | 1998-11-17 | 2004-01-06 | Cisco Technology, Inc. | Network mixed topology data switching with interconnect to provide storing and retrieving of data using a switch and interconnect to provide network notifications |
US6947384B2 (en) | 1999-01-11 | 2005-09-20 | Hewlett Packard Development Company, L.P. | MAC address learning and propagation in load balancing switch protocols |
US6556541B1 (en) * | 1999-01-11 | 2003-04-29 | Hewlett-Packard Development Company, L.P. | MAC address learning and propagation in load balancing switch protocols |
US20030179707A1 (en) * | 1999-01-11 | 2003-09-25 | Bare Ballard C. | MAC address learning and propagation in load balancing switch protocols |
US6519231B1 (en) * | 1999-01-12 | 2003-02-11 | Nortel Networks Limited | Method and apparatus providing a spanning tree protocol for a data communications network having a multi-link trunk |
US6560630B1 (en) * | 1999-03-18 | 2003-05-06 | 3Com Corporation | Receive load balancing and fail over with multiple network interface cards |
US6490632B1 (en) * | 1999-03-18 | 2002-12-03 | 3Com Corporation | High performance load balancing and fail over support of internet protocol exchange traffic over multiple network interface cards |
US6760331B1 (en) * | 1999-03-31 | 2004-07-06 | Cisco Technology, Inc. | Multicast routing with nearest queue first allocation and dynamic and static vector quantization |
US6801949B1 (en) * | 1999-04-12 | 2004-10-05 | Rainfinity, Inc. | Distributed server cluster with graphical user interface |
US6775280B1 (en) * | 1999-04-29 | 2004-08-10 | Cisco Technology, Inc. | Methods and apparatus for routing packets using policy and network efficiency information |
US8077604B1 (en) | 1999-06-29 | 2011-12-13 | Cisco Technology, Inc. | Load sharing and redundancy scheme |
US9276834B2 (en) | 1999-06-29 | 2016-03-01 | Cisco Technology, Inc. | Load sharing and redundancy scheme |
US7161945B1 (en) * | 1999-08-30 | 2007-01-09 | Broadcom Corporation | Cable modem termination system |
US7299294B1 (en) | 1999-11-10 | 2007-11-20 | Emc Corporation | Distributed traffic controller for network data |
US7349979B1 (en) * | 1999-12-02 | 2008-03-25 | Cisco Technology, Inc. | Method and apparatus for redirecting network traffic |
US8539111B2 (en) * | 1999-12-30 | 2013-09-17 | Avaya Inc. | Port switch |
US20030200341A1 (en) * | 1999-12-30 | 2003-10-23 | Nortel Networks Corporation, A Canadian Corporation | Port switch |
US7966409B1 (en) | 2000-01-18 | 2011-06-21 | Cisco Technology, Inc. | Routing protocol based redundancy design for shared-access networks |
USRE44661E1 (en) | 2000-01-18 | 2013-12-24 | Cisco Technology, Inc. | Method for a cable modem to rapidly switch to a backup CMTS |
US6789127B1 (en) * | 2000-02-15 | 2004-09-07 | Lucent Technologies Inc. | Preparation for network interface recognition of network packet portion with declarative notation for field thereof and constraint therefor |
US7062571B1 (en) * | 2000-06-30 | 2006-06-13 | Cisco Technology, Inc. | Efficient IP load-balancing traffic distribution using ternary CAMs |
US20110199925A1 (en) * | 2000-09-06 | 2011-08-18 | Juniper Networks, Inc. | Packet switching equipment and switching control method |
US7131140B1 (en) * | 2000-12-29 | 2006-10-31 | Cisco Technology, Inc. | Method for protecting a firewall load balancer from a denial of service attack |
US7770215B2 (en) | 2000-12-29 | 2010-08-03 | Cisco Technology, Inc. | Method for protecting a firewall load balancer from a denial of service attack |
US7881208B1 (en) | 2001-06-18 | 2011-02-01 | Cisco Technology, Inc. | Gateway load balancing protocol |
US7047303B2 (en) * | 2001-07-26 | 2006-05-16 | International Business Machines Corporation | Apparatus and method for using a network processor to guard against a “denial-of-service” attack on a server or server cluster |
US20030023733A1 (en) * | 2001-07-26 | 2003-01-30 | International Business Machines Corporation | Apparatus and method for using a network processor to guard against a "denial-of-service" attack on a server or server cluster |
US20030063594A1 (en) * | 2001-08-13 | 2003-04-03 | Via Technologies, Inc. | Load balance device and method for packet switching |
US6772224B2 (en) | 2001-08-22 | 2004-08-03 | Spatial Communications Technologies, Inc. | Method and system for processing load distribution for a packetized telecommunication network entity |
WO2003019881A1 (en) * | 2001-08-22 | 2003-03-06 | Spatial Communication Technologies, Inc. | Method and system for processing load distribution for a packetized telecommunication network entity |
US7231455B2 (en) | 2002-01-14 | 2007-06-12 | Sun Microsystems, Inc. | System monitoring service using throttle mechanisms to manage data loads and timing |
US20030135639A1 (en) * | 2002-01-14 | 2003-07-17 | Richard Marejka | System monitoring service using throttle mechanisms to manage data loads and timing |
US7551616B2 (en) | 2002-02-01 | 2009-06-23 | Fujitsu Limited | Forwarding packets to aggregated links using distributed ingress card processing |
US20030147387A1 (en) * | 2002-02-01 | 2003-08-07 | Fujitsu Network Communications, Inc. | Forwarding packets to aggregated links using distributed ingress card processing |
US6973082B2 (en) | 2002-02-01 | 2005-12-06 | Fujitsu Limited | Forwarding packets to aggregated links using distributed ingress card processing |
US20050238018A1 (en) * | 2002-02-01 | 2005-10-27 | Fujitsu Limited, A Japanese Corporation | Forwarding packets to aggregated links using distributed ingress card processing |
US20030200477A1 (en) * | 2002-04-17 | 2003-10-23 | International Business Machines Corporation | Method, system, and program for selecting a path to a device to use when sending data requests to the device |
US7134040B2 (en) | 2002-04-17 | 2006-11-07 | International Business Machines Corporation | Method, system, and program for selecting a path to a device to use when sending data requests to the device |
US20040006622A1 (en) * | 2002-07-03 | 2004-01-08 | Burkes Don L. | Optimized process for balancing load for data mirroring |
US20040071142A1 (en) * | 2002-10-11 | 2004-04-15 | Hitachi, Ltd. | Packet communication device |
US7298752B2 (en) * | 2002-10-11 | 2007-11-20 | Hitachi, Ltd. | Packet communication device |
US20040215703A1 (en) * | 2003-02-18 | 2004-10-28 | Xiping Song | System supporting concurrent operation of multiple executable application operation sessions |
US7159034B1 (en) | 2003-03-03 | 2007-01-02 | Novell, Inc. | System broadcasting ARP request from a server using a different IP address to balance incoming traffic load from clients via different network interface cards |
US7392318B1 (en) * | 2003-03-21 | 2008-06-24 | Novell, Inc. | Method and system for balancing a traffic load in a half-duplex environment |
US20040221065A1 (en) * | 2003-04-30 | 2004-11-04 | International Business Machines Corporation | Apparatus and method for dynamic sharing of server network interface resources |
US7263555B2 (en) * | 2003-04-30 | 2007-08-28 | International Business Machines Corporation | Apparatus and method for dynamic sharing of server network interface resources |
US20040260745A1 (en) * | 2003-06-18 | 2004-12-23 | Gage Christopher A. S. | Load balancer performance using affinity modification |
US20040257990A1 (en) * | 2003-06-19 | 2004-12-23 | International Business Machines Corporation | Interchassis switch controlled ingress transmission capacity |
US7593346B2 (en) | 2003-07-31 | 2009-09-22 | Cisco Technology, Inc. | Distributing and balancing traffic flow in a virtual gateway |
US7724670B2 (en) | 2003-08-05 | 2010-05-25 | Scalent Systems, Inc. | Method and apparatus for achieving dynamic capacity and high availability in multi-stage data networks using adaptive flow-based routing |
US20050091396A1 (en) * | 2003-08-05 | 2005-04-28 | Chandrasekharan Nilakantan | Method and apparatus for achieving dynamic capacity and high availability in multi-stage data networks using adaptive flow-based routing |
US7483374B2 (en) | 2003-08-05 | 2009-01-27 | Scalent Systems, Inc. | Method and apparatus for achieving dynamic capacity and high availability in multi-stage data networks using adaptive flow-based routing |
US20090097406A1 (en) * | 2003-08-05 | 2009-04-16 | Scalent Systems, Inc. | Method and apparatus for achieving dynamic capacity and high availability in multi-stage data networks using adaptive flow-based routing |
US20050063395A1 (en) * | 2003-09-18 | 2005-03-24 | Cisco Technology, Inc. | Virtual network device |
US7751416B2 (en) | 2003-09-18 | 2010-07-06 | Cisco Technology, Inc. | Virtual network device |
US7839843B2 (en) | 2003-09-18 | 2010-11-23 | Cisco Technology, Inc. | Distributed forwarding in virtual network devices |
US20050163115A1 (en) * | 2003-09-18 | 2005-07-28 | Sitaram Dontu | Distributed forwarding in virtual network devices |
WO2005043842A1 (en) * | 2003-10-21 | 2005-05-12 | Cicso Technology, Inc. | Port-based loadsharing for an access-layer switch |
US8526427B1 (en) | 2003-10-21 | 2013-09-03 | Cisco Technology, Inc. | Port-based loadsharing for a satellite switch |
CN1871822B (en) * | 2003-10-21 | 2011-04-06 | 思科技术公司 | Port-based loadsharing for an access-layer switch |
US10069765B2 (en) | 2004-02-19 | 2018-09-04 | Cisco Technology, Inc. | Interface bundles in virtual network devices |
US20050198371A1 (en) * | 2004-02-19 | 2005-09-08 | Smith Michael R. | Interface bundles in virtual network devices |
US8990430B2 (en) | 2004-02-19 | 2015-03-24 | Cisco Technology, Inc. | Interface bundles in virtual network devices |
US8208370B1 (en) | 2004-03-31 | 2012-06-26 | Cisco Technology, Inc. | Method and system for fast link failover |
US7889733B2 (en) | 2004-04-28 | 2011-02-15 | Cisco Technology, Inc. | Intelligent adjunct network device |
US8755382B2 (en) | 2004-04-28 | 2014-06-17 | Cisco Technology, Inc. | Intelligent adjunct network device |
US9621419B2 (en) | 2004-04-28 | 2017-04-11 | Cisco Technology, Inc. | Determining when to switch to a standby intelligent adjunct network device |
US20050243826A1 (en) * | 2004-04-28 | 2005-11-03 | Smith Michael R | Intelligent adjunct network device |
US20110134923A1 (en) * | 2004-04-28 | 2011-06-09 | Smith Michael R | Intelligent Adjunct Network Device |
US7706364B2 (en) | 2004-05-19 | 2010-04-27 | Cisco Technology, Inc. | Virtual network device clusters |
US7710957B2 (en) | 2004-05-19 | 2010-05-04 | Cisco Technology, Inc. | System and method for implementing multiple spanning trees per network |
US8059652B2 (en) | 2004-06-30 | 2011-11-15 | Cisco Technology, Inc. | Method and apparatus for detecting support for a protocol defining supplemental headers |
US20090086641A1 (en) * | 2004-06-30 | 2009-04-02 | Faisal Mushtaq | Method and Apparatus for Detecting Support for A Protocol Defining Supplemental Headers |
US8929207B1 (en) | 2004-07-08 | 2015-01-06 | Cisco Technology, Inc. | Network device architecture for centralized packet processing |
US20060023718A1 (en) * | 2004-07-08 | 2006-02-02 | Christophe Joly | Network device architecture for centralized packet processing |
US7808983B2 (en) | 2004-07-08 | 2010-10-05 | Cisco Technology, Inc. | Network device architecture for centralized packet processing |
US7822025B1 (en) | 2004-07-08 | 2010-10-26 | Cisco Technology, Inc. | Network device architecture for centralized packet processing |
US8730976B2 (en) | 2004-08-17 | 2014-05-20 | Cisco Technology, Inc. | System and method for preventing erroneous link aggregation due to component relocation |
US20060039384A1 (en) * | 2004-08-17 | 2006-02-23 | Sitaram Dontu | System and method for preventing erroneous link aggregation due to component relocation |
US7876689B2 (en) * | 2005-06-29 | 2011-01-25 | Hewlett-Packard Development Company, L.P. | Method and apparatus for load balancing network interface adapters based on network information |
US20070002738A1 (en) * | 2005-06-29 | 2007-01-04 | Mcgee Michael S | Method and apparatus for load balancing network interface adapters based on network information |
US8386624B2 (en) * | 2006-03-14 | 2013-02-26 | Fujitsu Limited | Broadcast processing method for network system and network system |
US20070217450A1 (en) * | 2006-03-14 | 2007-09-20 | Fujitsu Limited | Broadcast processing method for network system and network system |
US20100011230A1 (en) * | 2008-07-08 | 2010-01-14 | Olaf Mater | Link aggregation with dynamic bandwidth management to reduce power consumption |
US8099498B2 (en) | 2008-09-03 | 2012-01-17 | Microsoft Corporation | Probabilistic mesh routing |
US8473455B2 (en) | 2008-09-03 | 2013-06-25 | Microsoft Corporation | Query-oriented message characterization |
US20100057933A1 (en) * | 2008-09-03 | 2010-03-04 | Microsoft Corporation | Probabilistic mesh routing |
US8898144B2 (en) | 2008-09-03 | 2014-11-25 | Microsoft Corporation | Query-oriented message characterization |
US20100057707A1 (en) * | 2008-09-03 | 2010-03-04 | Microsoft Corporation | Query-oriented message characterization |
US9059932B2 (en) | 2011-11-03 | 2015-06-16 | Qualcomm Incorporated | Packet ordering based on delivery route changes in communication networks |
US8824477B2 (en) | 2011-11-03 | 2014-09-02 | Qualcomm Incorporated | Multiple delivery route packet ordering |
US20130198411A1 (en) * | 2012-01-27 | 2013-08-01 | Electronics And Telecommunications Research Institute | Packet processing apparatus and method for load balancing of multi-layered protocols |
US9660938B2 (en) | 2012-08-20 | 2017-05-23 | Cisco Technology, Inc. | Two-stage port-channel resolution in a multistage fabric switch |
US20140050217A1 (en) * | 2012-08-20 | 2014-02-20 | Cisco Technology, Inc. | Two-Stage Port-Channel Resolution in a Multistage Fabric Switch |
US8902888B2 (en) * | 2012-08-20 | 2014-12-02 | Cisco Technology, Inc. | Two-stage port-channel resolution in a multistage fabric switch |
US10348646B2 (en) | 2012-08-20 | 2019-07-09 | Cisco Technology, Inc. | Two-stage port-channel resolution in a multistage fabric switch |
US20140161137A1 (en) * | 2012-12-10 | 2014-06-12 | Dell Products L.P. | Systems and methods for automating virtual network interface controller configuration during workload provisioning |
US8923320B2 (en) * | 2012-12-10 | 2014-12-30 | Dell Products L.P. | Systems and methods for automating virtual network interface controller configuration during workload provisioning |
US8976666B2 (en) * | 2013-07-25 | 2015-03-10 | Iboss, Inc. | Load balancing network adapter |
CN109309636A (en) * | 2017-07-27 | 2019-02-05 | 西门子瑞士有限公司 | The network switch |
Also Published As
Publication number | Publication date |
---|---|
US5864535A (en) | 1999-01-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6243360B1 (en) | Network server having dynamic load balancing of messages in both inbound and outbound directions | |
US5590328A (en) | Protocol parallel processing apparatus having a plurality of CPUs allocated to process hierarchical protocols | |
US5588121A (en) | Parallel computer having MAC-relay layer snooped transport header to determine if a message should be routed directly to transport layer depending on its destination | |
CN111464592B (en) | Load balancing method, device, equipment and storage medium based on micro-service | |
JP4053967B2 (en) | VLAN server | |
US6665304B2 (en) | Method and apparatus for providing an integrated cluster alias address | |
US5918021A (en) | System and method for dynamic distribution of data packets through multiple channels | |
US6272522B1 (en) | Computer data packet switching and load balancing system using a general-purpose multiprocessor architecture | |
US6510164B1 (en) | User-level dedicated interface for IP applications in a data packet switching and load balancing system | |
US6512774B1 (en) | Fail over with multiple network interface cards | |
EP0891061B1 (en) | Method and system for link level server/switch trunking | |
US6272136B1 (en) | Pseudo-interface between control and switching modules of a data packet switching and load balancing system | |
US6424621B1 (en) | Software interface between switching module and operating system of a data packet switching and load balancing system | |
US6041063A (en) | High availability, scaleable bandwidth, multiport ATM-emulated LAN interface | |
US6397260B1 (en) | Automatic load sharing for network routers | |
CN101442493B (en) | Method for distributing IP message, cluster system and load equalizer | |
KR20050035722A (en) | A server load balancing device and method using mpls session label | |
US6760336B1 (en) | Flow detection scheme to support QoS flows between source and destination nodes | |
KR870003630A (en) | Packet Switching System and Network Operation Method Using The Same | |
WO1996038792A1 (en) | Monitoring and control of data flow in a computer network device | |
US20050050179A1 (en) | Method, apparatus and computer program product for implementing enhanced proxy ARP for virtual IP addresses | |
CN112866107A (en) | IP address notification method, traffic guiding method and network equipment | |
CN114584423B (en) | Communication method and device based on virtual binding network card | |
JP2596098B2 (en) | Communication line selection method | |
KR100372723B1 (en) | How to Extend Transmission Band of TPC / IP Server |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
FPAY | Fee payment |
Year of fee payment: 12 |
|
SULP | Surcharge for late payment |
Year of fee payment: 11 |